Machinist&#39;s combination-tool.



PATENTED JULY 12, 1904.

. s FRIEDMAN. MAGHINISTS COMBINATION TOOL.

APPLICATION FILED FEB. 9. 1904.

N0 MODEL.

UNITED STATES Patented July 12, 1904.

PATENT OFFICE.

MACHINISTS COMBINATION-TOOL.

SPECIFICATION forming part of Letters Patent No. 764,937, dated July 12,1904.

Application filed February 9, 1904. Serial No. 192,755. (No model.)

To all whom it may concern.-

Be it known that I, SIGMUND FRIEDMAN, a citizen of the United States,residing in Paterson, in the county of Passaic and State of New Jersey,have invented certain new and useful Improvements in MachinistsCombination-Tools; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to lettersof reference marked thereon, which form a part of this specification.

The object of this invention is to provide a simply-constructed,inexpensive, and durable combination measuring instrument for use bymachinists or the like; and it consists in certain features ofconstruction combined and arranged substantially as hereinafter setforth and claimed in such manner as to attain the objects mentioned.

My invention will be found fully illustrated in'the accompanyingdrawings, wherein Figure 1 is a plan view thereof. Fig. 2 is a view ofthe left-hand end portion of the instrument, showing certain partsbroken away and others in section. Fig. 3 is a sectional view takentransversely of the instrument between two of the heads or jaws e,hereinafter referred to, and looking toward the left-hand one. Fig. 4:is a plan view of the left-hand portion of the instrument as shown inFig. 1, but provided in this instance with calipers instead of dividers,as in Fig. 1. Fig. 5 shows another form of caliper-leg that may be used;and Fig. 6 is a transverse section through one of the heads or jawsabove referred to, showing a modification of the invention.

a is a steel arm in the form of a plate or strip, one of whose edges isdivided off, as at b, to any desired degree after the manner of a ruleand having one end turned off at right angles, as at 0, Fig. 2. The part0 is reinforced or thickened up by a'bifurcated block (Z, (see Fig. 3,)riveted thereto, so that the whole forms, as at e in Fig. l, the head ofa square or one jaw of a sliding caliper. The plate a is provided with alengthwise slot f, and the thus divided portions of the plate are heldtogether at the end remote from the head or jaw by a block g, into whichsaid plate projects and which may be secured to said plate by screws /L.In the slot f is arranged a screw 2', one of whose ends, j, is reducedand jour naled in the plate a between the bifurcated portions of theblock (Z and the other, 70, of which is journaled in the block g andsquared, receiving at its extremity a crank Z or other form of handlefor rotating the screw. m is the part forming the other head or jaw ofthe sliding caliper. This is in the form of two plates at, rivetedtogether and provided with corresponding grooves 0, each of whichreceives one of the two members p of the plate a, formed by dividing thelatter lengthwise by the slot f. The screwz' has an internallythreadedengagement with the plates a of the jaw or head m, so that when thescrew is rotated the jaw or head is moved lengthwise of the plate a-thatis to say, adjusted with reference to the jaw or head a. As so fardescribed, the instrument is adapted for use as a sliding caliper.

Hinged to the block (Z on the end thereof remote from the divisions b onplate a is a holder g, and similarly hinged to the head m is anotherholder, 1'. The head or jaw which comprises block (Z is forked at (Z, atone end receiving a projection q of holder q, and the plates n n are atone end of head or jaw m spaced, as at on, receiving a projection 1" ofholder '1'. The pivot between each holder and the corresponding head orjaw is formed in each instance by a screws, which carries'a thumb-nut 6,whereby the holder may be clamped in any position to which it ispivotally adjusted. Each holder forms a socket for the reception of oneof two legs a, which may be either formed, as in Fig. 1, as the legsof apair of dividers, or, as in Figs. 4. and 5, as the legs of calipers ofdifferent shapes, such leg being held in place in the holder by aset-screw e.

As thus far described the instrument is adapted not only as a slidingcalipers, but as a dividers orcalipers having pivoted legs, adjustmentbeing possible both by turning the screw to adjust the head or and bymoving either leg at on its pivot ln'order to make possible the quicksetting of the head in to approximately the point on the plate a towhich is to be adjusted, the part of the head m which immediatelyengages the threading of the screw may be the form of a disconnectiveconnecting means between said head on and the screw.

In Fig. 6, w is a sliding block having one end threaded and normallyheld in engagement with the threading of the screw by a spring m,disposed between said block and the end of the recess 1 in the head m,in which said block is mounted. is a knob carried by said block, wherebyto press it back out of engagement with the screw, so that the head willbe free to be slid lengthwise on the plate a. Of course in this case itwill be understood that the screw 11 has no direct connection with thehead m, the opening for the screw through the head being in thisinstance smooth.

In using the instrument as a square it may be found convenient to removethe head m from the arm a. For this purpose the crank 6 may be securedon the squared portion A: of the screw 01 by a screw .2, so that thecrank Z can be removed, whereupon the screws it may be removed, so as todetach the block g and permit the head m to be slid ofi' the arm.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. The combination of an elongated longitudinally-slotted plate providedwith divisions and thus forming a scale and also having at one end anintegral turned-off portion, a bifurcated block receiving said end ofthe plate and the turned-ofi portion thereof and secured thereto andthus forming a fixed head or jaw, said head or jaw being forked at oneend thereof, a holder pivoted in the forked portion of said head or jaw,a sliding head or jaw arranged to move on said plate, ascrew arranged inthe slot of said plate and journaled in said first-named head or jaw andhaving its thread engaging the sliding head or jaw, and another holderpivoted in said sliding head or jaw, substantially as described.

2. The combination of an elongated longitudinally-slotted plate providedwith divisions and thus forming a scale, a head or jaw fixed to saidplate at one end thereof, a holder pivoted in said head or jaw, amovable head or jaw comprising plates secured together on opposite sidesof said elongated plate and having opposed slots receiving the portionsof said elongated plate which are separated by the slot of the latter,said plates being spaced at one end'of said movable head or jaw, anotherholder pivoted in between the spaced portions of said plates, and ascrew journaled in said fixed head and disposed in the slot of theelongated plate and having its thread engaging said movable head or jaw,substantially as described.

In testimony that I claim the foregoing I have hereunto set my hand this8th day of February, 1904.

SIGMUND FRIEDMAN.

Witnesses:

JOHN W. STEWARD, ROBERT J. PoLLITT.

